Two Logan Square is a highrise office building in downtown Philadelphia, just off the Benjamin Franklin Parkway. The building is known for its signature roofline with a backlit clock. It is a companion building to One Logan Square which stands across Cherry Street, and to Three Logan Square, across 18th Street. The building, designed by the firm Kohn Pedersen Fox, was completed in 1987, the same year as One Liberty Place, which stood as Philadelphia's tallest building for 20 years. Major tenants include the law firm Pepper Hamilton LLP and Binswanger.